The purpose of this research is to provide Space Station Freedom protective structures design insight through the coupling of design/material requirements, hypervelocity impact phenomenology, meteoroid and space debris environment sensitivities, optimization techniques and operations research strategies, and mission scenarios. The goals of the research are: (1) to develop a Monte Carlo simulation tool which will provide top level insight for Space Station protective structures designers; (2) to develop advanced shielding concepts relevant to Space Station Freedom using unique multiple bumper approaches; and (3) to investigate projectile shape effects on protective structures design. Mog, Robert A. and Helba, Michael J. and Hill, Janeil B. Unspecified Center HYPERVELOCITY IMPACT; MONTE CARLO METHOD; OPTIMIZATION; SPACE STATION FREEDOM; SPACECRAFT SHIELDING; SPACECRAFT SURVIVABILITY; BUMPERS; METEOROID CONCENTRATION; OPERATIONS RESEARCH; PROJECTILES; SPACE DEBRIS; SPACE STATION STRUCTURES...